Joe Rocket Sonic 2.0 Men's Leather Motorcycle Riding Jacket (Black, Medium) Removable underarm/side panels revealing FreeAir mesh ventilation (not included on perforated version), 1.2mm drum dyed cowhide construction (Also available in perforated leather) Removable spine pad with pocket for optional C.E. spine protector, Dual density body armor at the elbows and shoulders Sculpted high density rib/back padding Removable insulated vest liner, 6-point SureFit custom adjustment system (adjustable sleeves, wrists, and waist) Heavy duty YKK zippers, Full 360 plus 8 zipper for jacket to pant attachment, Reflective stripe